Drum lifting attachment for crane trucks



Aug. 31, 1948. v E, J, ROY 2,448,124

NE TRUCKS DRUM LIFTING ATTACHMENT FOR CRA 2 Sheets-Sheet 1 Filed July 24, 1946 I N VEN TOR.

ATTD RNEYB E. J. ROY

TR DRUM LIFTING ATTACHMENT FOR CRANE Aug. 31, 1948.

UCKS

1 Q0 2 1 t e 2 m 6 1 z a. 1 5 t w a w A 2 0 MN 9 %h 0 n0 1 Z 1 J /H1/ op 6 n WM 1m 7 9 Q um I 9 -m 4 2 0 MJ 2 6 1 AU M F l l o A" 2 v. 1 u J d e l .1 0 F INVENTOR. Ebwnv J P Y ATI'D RN EYE for attachmentto and Patented Aug. 31, 1948 DRUMLIFTING ATTA CEMENT Fon CRANE cons v Edwin J .Roy, Baton Rouge, La.

1946, Serial No. 685,986

Application July 24,

. Claims.

My=present invention relates generally to improvements in automotive or industrial trucks of the vertically swingingcrane type having a hoist-'- line and horizontally pivoted'carrienand more specincallyto a manuallycontrolled and power operated lifting mechanism for crane trucks. in the nature of a unitary assembly or equipment use with the truck in lifting andtransporting'certain types of loads.

While the lifting mechanism of my invention 153W? adapted for use in various ways, it is especiallydesigned for facilehandling of cylindricaldrums, or other liquid containers, insuch manner as to eliminate the ,pQSsibilityof spillage or waste of the contained liquid.

The primary objectv ofthe invention is to equip acrane truck of conventional type with a lifting or pick -up mechanism that is simple in construction and convenient in operation and control for eflectiveand efiicient use lifting, carrying or transporting; and depositing, aload or container of this nature. I

- The invention consists in certain novel combinations and arrangements of parts as well hereinafter be more fully set forth. In theaccompanying drawings I have illustrated one complete v. invention wherein theparts are arranged according to one ciples" of my invention, that various changes and alterations in these xemplifying drawings and mechanical structures, within the scope of my, appended the principles of claims, without" departing from side elevation of the crane parts in hori 'portation; and

Figure is an enlarged detailed sectional view approximately on the line 5-5 of Figure 1.

In order that the general arrangement and relation of parts may readily be understood I have illustrated a conventional truck or this type I mode [have so far devised forthe practical application oithe prinbut it will .be understood may be made.

having upwardly converging uprights I, l and an inclined crane 2 forming the main frame which is rigidly united with the usual chassis 3 of the automotive truck. 1 I

The hoist-line I from the hoisting drum 5' passes over and around sheaves 6 and I of the crane, and a motor 8 is mounted on :the chassis, with transmission gearing 9; .S'for operating the hoisting drum. Customary or suitable control means (not shown) are provided for controlling the driving and transmission means-between .the motor and the hoisting drum, and these manual control means are arranged in position for ready access of the operator who stands'upon the deck of'thetruck; The lifting and carrying mechanism of my invention includes a vertically swinging boom l0, which is made up of two forwardly converging and rigidly connected metal channel plates, and the-boom is pivoted at its rear. end upon a horizontal transversely extending rock-shaft H mounted in the plates or the uprights of the fixed crane.

At its free front end the boom isprovided with a carrier that includes a throat or U-shaped yoke ii that is rigidly united in suitable manner with the spaced plates 1 Or arms of the boom: :The semi-circular or bowed portion of the :yoke merges with two spaced parallel and straight armsof the yoke, and slots l3, l3 are provided in the yoke extending outwardl from the bow of the yoke and terminating in openings atv the front free ends of the yoke. I The yoke forms part of the load carrier, and it supports and guides a pair of opposed, arcuate or segmental clamping jaws l4, yll', mounted within the slotted yoke and'movable forwardly to closed or clamping position on the straight arrns of the yoke, and movable rearwardly to retracted or open position withlnthe bowed portion of the yoke.

v For this purpose with a centrally trunnion 15 which of the yoke and' is provided; with anti-friction guiding. and sliding collars I B- forco-action with the slotted' yoke. I

each clamping jaw is equipped located; outwardly radiating- In the retracted or open position of the jaws in passes through-aguide slot-13" I fixed support for ready access to the operator of article to be lifted, and manually controlled the hoist, and this lever is pivotally connected by means for operating the jaws.

a link 20 to a short rock-arm 2| rigid with the 2. In an automotive crane truck of the vertirock shaft II and located on a projecting end of cally swinging type, the combination with a the shaft exterior of the uprights I. t

At the longitudinal center of the rock shaft a therefor, of a slotted U-shaped yoke rigid with longer rock-arm 22 is rigidly mounted, and this the boom, open ended slots in the yoke longiarm is connected by a link 23 to a sliding crosstudinally thereof, a pair of clamping jaws havhead 24 having its opposite ends'slidably mounted ingl trunnions slidably mounted 'inthe slots in in longitudinal grooves 25 of the spaced arms 1 the yoke, and lever actuated mechanism operaforming the boom Ill. tively connected with said trunnions for pro- The sliding cross-head 24 transmits movement jecting and retracting the jaws with respect to and power through a pair of laterally spaced and the slotsin the yoke to effect clamping engageoutwardly flared or diverging links 28, which are ment with an article to be lifted. pivoted at 21, 21 to the trunnions or bosses I of 15, 3. In an automotive crane truck of the vertithe clamp jaws. cally swinging type, the combination with a A well known or conventionaltype of cylinpivoted hoisting-boom and operating means drical metallic drum or container D illustiated therefor, and a longitudinally slotted U-shaped in the drawings, as a load, and the drum is proy'okerigid with the free end of the boom, of a vided with the usual chime C at its upper open pair of clamping jaws having trunnions slidably end. J With the clamping jaws retracted, the crane retaining housings mounted within the bow 0t truck-is run into position of Fig. with the boom the yoke, and lever actuated mechanism operaof the drum, and the yoke of the carrier in posi- 5 mg and retracting the jaws with respect to the nism under manual control of the operator Jecting and retracting the Jaws with respect to Due to the flexibility of the linkage in the liftthe slots in the yoke to efi'ect clamping engagei-ng mechanism, the diametrically arranged trun- 4.0 ment With an article to'be lifted. Y nions provide a swiveled support for the drum D, 5. In a lifting hoist mechanism, the combina in order that the drum may remain in level pos1 tlon with a support a rock-shaft mounted theredrilm' may be transported to an unloading means for the boom, of a longitudinallyslotted position of Fig. 4 to that of Fig. 2 to withdraw f th om nd lin s p r ively conn c in' the leasing the drum from the carrier, actuated mechanism for rocking the rock-shaft Having thus fully described my invention, what including linkage between th haft and Said I claim as new and desire to secure by Letters SS-head-- Patent is: 55, EDWIN J. ROY.

1. In a portable crane of the vertically swing ing type, the combination with a hoisting-boom REFERENCES CITED and op ra in m n ther f r, 'of 'a' carr r r i The following references are, of recordin the with the. boom and including a U-shaped yoke, fil of this atentslots in the yoke extending outwardly from the, p I

bow of the yoke and terminating in openings at UNITED STATES PATENTS v the front free ends of the yoke, a'pairof opposed Number Name Date clamping jaws, a trunnion on each opposed jaw 459,430 Zahrn Septl 15 1891 slidably mounted inits respective slot in the yoke, 1,293,699 Cannon Feb 11 1919 and adapted to be projectedforwardly in the 6 1,717,377 Forry 'Jun is 1929- slots into diametrical arrangement with each 1,794,148 I Collins If V Feb. 24, 1931 

